Research studies into the negative health effects of probiotic use

Despite the considerable interest in recent decades about the potential benefits of modifying the gastrointestinal flora by using probiotic supplementation, the evidence for its effectiveness has been conflicting. Although initial findings seemed to support the idea that supplementing with beneficial microorganisms such as Lactobacillus for a variety of conditions could only improve health outcomes, the following studies demonstrate that in some clinical settings the administration of probiotics has not only proven ineffective, but harmful.

Acidosis, bloating and brain fog

Weight gain

More sensitive to allergies

Increased mortality with acute pancreatitis

Higher risk of endocarditis

Other issues

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